socks5 server c

SOCKS V5 server

A simple SOCKS V5 proxy server.

Features

• Supports TCP proxy and UDP proxy
• Support proxy DNS query
• Support username and password authentication method

Build

Use make to complete compilation and linking.

$ make

If followed by CFLAG=-DDEBUG debugging mode is enabled:

$ make CFLAG=-DDEBUG

Usage

If started without any options, it will listen on port 1080 and no authentication is required.

$ ./server
NO AUTHENTICATION REQUIRED
Listening at 0.0.0.0:1080

With the -h option, help information is displayed.

$ ./server -h
usage: ./server [options]
options: 
  -a < address >         Local Address to bind (default: 0.0.0.0).
  -p < port >            Port number to bind (default: 1080).
  -u < path/to/passwd >  The path to passwd.
  -d                   Run as a daemon.
  -h                   Show this help message.

Options -a and -p are used to specify the IP address and port number bound to the server respectively.

$ ./server -a 127.0.0.1 -p 8080
NO AUTHENTICATION REQUIRED
Listening at 127.0.0.1:8080

The option -u is used to enable username and password authentication. The option must be followed by the path to a file. Each line of the file corresponds to a user, and the username and password are separated by commas , for example:

$ cat ./passwd
user1,123456
user2,666
user3,2333
$ ./server -u ./passwd
USERNAME/PASSWORD
3 users
Listening at 0.0.0.0:1080

If the -d parameter is given, the server will leave the terminal and become a daemon process.

$ ./server -d
NO AUTHENTICATION REQUIRED
Listening at 0.0.0.0:1080
PID is [xxxxx]
$ netstat -ntlp | grep xxxxx
tcp        0      0 0.0.0.0:1080                0.0.0.0: *                   LISTEN      xxxxx/./server

License

This project adopts the MIT open source license agreement.

 MIT License

Copyright (c) 2019-2021 totravel

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.